Firebird Subquery

Good day

I would like to know how can I do the following subquery.

I have two tables and my data looks like this

Table A
Suite  [PK]
Week [PK]
RoomStatus

Table B
Suite  [FK]
Week [FK]
HomeRoom

example of data in table A
Suite    Week    RoomStatus
A         1           OPEN
B         2           OPEN
C         3           CLOSE


Example of data in table B

Suite  Week     HomeRoom
A       1            A
B       1            C
C       1            B

Now in my select I want to select everything from table B, but I want to get for each row the person actual RoomStatus from table a.

for example row 1 in table B, the guest HomeRoom  = the Suite where he is currently in,
but row two The guest are in Room B but his HomeRoom is C ( I need now in this select his RoomStatus from table a)

If possible I want to use a subquery to perform this select because I need to perform a lot of additional sql once I got the data.

Thank you
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